Door lock



oct. 5, 1948.

J. H MILLIGAN DOOR LOCK Filed Jan. 8, 1946 7 Shetsf-Sheet 1 3 3 .6 6 M M 7 7 7 m Y z H M3 mw 7 h 7 e? .0 n@ 0 5 5 6 9 o 4 ,KN 4 a l //////fe .8 .a m 5 u 8 .r//A Il u n f Erv I 7 l l o l a 7 a e al @a w a u JTW.. 0 w ...w 9 5 7Tw u 6 6 .,...Ff 1 nah 3 5 twuLL l o r a M s ulfowaaqya 0d .5 1948.- J. H. `lvnLLlcam i 2,450,840

I noon Locx Filed Jan. s, 1946 7 sheets-sheet s esq', eee

Oct. 5, 1948. J. H. M|LL.|GAN y l 2,450,840

' Doon4 Loca Filled' Jan. e.' 194e j l 7 sheets-sheet 4 a9 l sf 2,930, Jgaa.

44 a8 44' 4a. 85 8&83

, i 46 ma v @i @d oct. s, 194s.

DOOR LOCK med Jan. e. 194e l 1m 10j-10? l IZ? 114. K 10.9 7 1,0 l

zal l I 163 @z l? 12 l zal' 161 v 3 IIS . 183m s im 1a? INVENTOR. Joseph H. Milug@ BYMMW 7 Sheets-Sheet 5 Oct. 5, 1948. J. H. MILLIGAN 2,450,840

l DooR Lock A Filed Jan. a. 194e v sheets-sheet esv` IN1/mma. BY Joseph H. Mi I gan Oct. 5, 1948. J. H. MILLIGAN l 2,450,840

' Y Doon Locx FledJan. 8. 191164 y '7 Shania-'Sheet 7 -INVENTOR.

`ByJqseph H. Milligan Patented 5,1948

p Doon Loox e Joseph II. Milligan, Framingham. Mass. Application January s, 1946, serial No. 639,792

. 1 This invention relates to door locks and especially to that y'type of door lock in which one of lock mechanism incorporated therein and is normally locked from turning movement but can be unlocked by means of a key so. that it can be -turned to withdraw the door latch when the door is to be opened.

In doors 'having door knobs for opening the door, the two knobs are commonly mountedxon a dat sidedspindle which extends through the door and which carries a collar having arms that cooperate with ngers with which the door latch is provided, so that when either knob is turned the resultant turning movementl of the spindle operates to'withdraw th'e door latch.

It is one of the objects of my present invention to provide 'a novel door lock of the above-mentioned type` which can be readily substituted for th'e ordinary pair of knobs and spindle of any door without making any alteration in the door itself, whereby a door which is provided with door knobs but not provided with a lock can be easily converted into a door having a door lock and which requires the use of a key for unlocking it.

Another object of the invention is to provide a door lock of this type in which the outer knob is normally locked from turning movement and is also normally disconnected from the spindle, and in which the'insertion of a proper key in the key slot of the outer knob will not onlyl unlock said outer knob so that it can be turned, but will also clutchthe unlocked outer knob to the spindle so that turning movement of the outer knob will turn the spindle and th'us withdraw thedoor latch.

A further object of the invention is to provide novel means whereby a person on the inside of the door canset the lock so that the outside knob.

' the `door knobs, usually the outer door knob, has a 2 a has been set to render the outside knob inoperative to open the door when said knob is unlocked by the usual key, the outsideknob can still be rendered operative to open the door by using a special key for unlocking it.

Other objects of the invention. are to provide various Anovel features relating tdoor'locks of this type which will be more fully hereinafter set forth and then pointed out in said claims.

In the drawings:

Fig. 1 shows a portion of a door which is equipped with my improved lock,l said gure showing the outside knob in end elevation.

Fig. 2 is a. section on the line 272, Fig. 1 showing the position of the parts when the regular pass key vhas been inserted into the lock for unlocking the outer knob.

Fig. 3 is a similar section showing the lock set so that the outside'knob can be turned to open the door without the use of a key.

Fig. 4 is a partial sectional view illustrating the position of the parts when the lock has been set so that the outside knob-can be unlocked and operated only by the use of a special key.

Fig. 5 is a section on the line' 5 5, Fig. 4.

Fig, 6 is a section on the line 6 6, Fig. 4.

Fig. 7 is a section on the line '1 -1, Fig. 4.

Fig. 8 is a perspective. vview of the knob-supporting member.

Fig. 9 is a perspective view of the means for yieldingly holding the inner knob in central posif tion. f

side without the use of a key by simply turning y the outside knob,

A further object of the invention is to provide a door lock of this type which is constructed so that a person on the inside of the door may set the lock so that the outside knob will-remain unclutehed from the spindleeven after said outer knob has been unlocked by the insertion of 4a key, thereby making it impossible for a.l person on the voutside of the door to open the latter even though he has the proper key.

A still further object of the invention is to pro- 'vide a novel construction wherein when the lock Fig. 10v is Ia view similar to Fig. 2 but showing the position of parts when the door is locked and before the key is inserted.

Fig. 11 is a fragmentary view showing the position of the parts by which th'e outer knob is clutched to the spindle when 'the lock is set as shown in Fig. 3 so that the outer knob can be turned to open the-door without the use of a key.

Fig. 12 is a view similar to Fig. 11 but showing the normal position of the clutch parts.

Fig. 13 is another view similar to Fig. 11 but illustrating the position of the clutch parts when the outer knob has been clutched to the spindle by the insertion of a key into th'e key slot.

Fig. 14 is a sectional view through the plate or disk secured to the outer knob by which it is cou- Fig. V19 'is a fragmentary view showing the means by whibh the follower pins lare raised when the lock is set from the inside of the door so as to permit the door to be opened by turning the outer knob and without the use or a key. [if

Fig. 20 is a perspective view of one of the clutch members by which the outer knob is clutched to the spindle.

Fig. 21 is a side view of said clutch member.

Fig. 22 is a. fragmentary section through the sleeve 11.

Fig. 23 is a sectional view similar to Fig. 2 but showing a different embodiment of the invention.

Fig. 24 is a view similar to Fig. 23 but showing the position of Ithe parts when a key has been inserted into the key plug of the outer knob and said knob has been clutchedto the spindle.

Fig. 25 is a fragmentary view showing the position of the clutch parts when the lock has been so set from the inside of the door that the door may be opened by turning the outer knob without the use of a key.

Fig. 26 is a section on the line 28-26, Fig. 23.

Fig. 27 is a section on the line 21--21, Fig. 23.

Fig. 28 is a section on the line 2'8-28, Fig. 24.

Fig. 29 is a perspective view of the clutch. by which the outer knob is clutched to the spindle, showing the two clutch members engaged.

Fig. 30 is a view similar to Fig. 29 but showing the clutch members disengaged.

Fig. 31- is a fragmentary perspective view showing the knob |63 in its normal position illustrated in Figs. 23 and 24. f

Fig. 32 is a view similar to Fig. 31 but showing the stem for the inner clutch pulled inwardly thereby so setting the lock that the door can bel opened by turning the outer knob without the use of a key.

Eig. 33 is a perspective view of the collar by which the parts are retained in the portion shown in Fig. 32.

fFig. 34 is an end View oi' the outer knob. f

verting the door into one which can be locked and which requires the use of a key for unlocking it.

In the device herein illustrated, the outside' knob of the improved knob assembly is indicated at I3 and the inside knob is indicated at I4. These two knobs are connected by a ilat sided spindle Il which extends through the door and through the square opening in the collar II.

In both forms of the invention herein illustrated, the outer knob is normally locked against turning movement and is disconnected from the spindle while theinner knob is normally connected to the spindle so that the door can at all times be opened from the inside.

Furthermore, in both forms oi the invention, the insertion of a key into the key slot of the outer knob results not only in unlocking the outer knob -so that it can b e turned, but also results in clutching, or coupling, the outer knob to the spindle so that turning movement of the unlocked outer knob will turn the spindle and thus withdraw the door latch.

In the construction shown in Figs. 1 to 22 the outside knob-I3 is mounted for turning movement on a stationary knob supporting member I8 which is stationarily secured to the door I.

vWhile the knob-supporting member may be Fig. 35 is a fragmentary perspective view of the barrel seen from the inner end.

Fig. 36 is a fragmentary section on the line 3B-36, Fig. 34.

Fig. 37 is a transversesection through Fig. 36. Fig. 38 is a, perspective view of the sleeve |10. F In the drawings I indicates a portion of a door lwhich is equipped with the usual spring pressed door latch 2, the latter having a body portion 3 which is received in a housing 4 that is set into a recess 5 with which the door i is provided, the front plate 6 of the housing having an opening through which the nose 1 or the latch 2 projects. The body of the door latch is provided with two rearwardly extending arms' 8 each having at its inner end an inturned nger 9, shown-in dotted lines in Fig. 1, said fingers 9 co-operating with the arms I0 formed on a collar II that is journ-aleld in the housing 9 and is provided with a square hole through which the square spindle of the knob assembly passes so that when either knob is turned, the turning movement of the collar will operate through one or the other of the arms I0 to move the latch 2 backwardly against the action of a spring I2 which normally holds the latch rigidly attached to the door I in any suitable way, I have herein shown a construction which facilitates the mounting of said member on a door and also which provides for its ready removal therefrom.

The knob-supporting member I6, which is shown in perspective view in Fig. 8, is attached by means of screws I1 to an attaching disk Il which is herein shown as provided on its inner face with two attaching studs I9. The door I has an anchoring plate 20 secured thereto by suitable screws 2| and this anchoring plate is provided with two openings 22 adapted to receive the studs |19. Each stud is cut away on one side to provide a notch 23 of a width corresponding to the thickness of that portion of the anchoring plate 20 in which the openings 22 are located.

To attach the knob-supporting member IB with the outer knob I3 mounted thereon to the door, the anchoring disk 20 is rst secured to the outside of the door by the screws 2| and then the studs I9 which project inwardly from the attaching disk I8 (it being understood that said attaching disk is secured to the inner end of the knobsupporting member I6 by means of screws I1) are inserted through the openings 22 in the anchoring plate and said knob and knob-supporting member are then turned slightly about their common vaxis to bring the edges of the openings 22into the notches 23thereby locking the knob-supporting `member to the anchoring 'plate 29. The attaching plate I8 is provided with a radially arranged locking pin |24 which is backed by a spring 25vand which snaps into an opening 28 in the ange 21 of the anchoring disk 20 thereby locking the knob supporting member I6 and the anchoring disk 20 from relative turning movement. In this way, the knob-supporting iiember is rigidly and stationarily secured to the The knob supporting member I8 is provided with a key plug 28 having a key slot 29 and said plug is normally locked to the stationary knobsupporting member by the usual tumbler pins l. and follower pins 3|, the latter being backed by usual springs 32.

When a properly cut key 33 is inserted into the key slot 29, the tumbler pins will be lined up as the. plug from the stationary knobsupp0rting member I8 so that the plug can be turned.

The outside knob n is mounted on the knobsupporting member I8 for turning movement as stated above.A but lis so connected to the key plug usual in locks of the Yale type thereby unlocking 28 that said outside knob and key plug can have no relative turning movement but must always 1 turn in unison.

One way in which this end is accomplished is by making the key plug with a circumferential rib 84 which has the two opposed at sides 85 lwhich engages the flat sides of a recess 88 lthe tumbler pins 38 thereby'to unlock the knob.

I8, also renders the clutch device operative thereby clutching the plug to the spindle with the respindle, and, of course, the follower pinsautol matically become operative to lock the knob .I8 to the knob-supporting member I6.

I have provided means herein -whereby the lock can be so set from the inside of the room thatv the spindle I will remain clutched to the key plug andthe tumbler pins will remain lined up even after the key 38 has been removed, thereby making it possible to operate the outer kiliob Il vand open the door without the use of a ey. Y

I have also provided herein means whereby the lock can be s'o set from the inside oi' the door that the clutch will remain disengaged even when -the pass key 33 has been i'ullyw inserted into the key slot and the tumbler pins have been consequently lined up thereby making it impossible to operate the spindle I5 and open the suit that the turning of the outer knob ls wm turn the spindle and thus withdraw the door latch 2. i

This clutch device comprises two clutch elements '81, 38. The inner clutch element 31 is coupled to the spindle I5 and is shown as having a diametrical slot 38 adapted to receive a diametrical rib 40 with which the outer clutch member 38 is provided. The inner clutch member 31 is provided with a nn 4I which is received in a slot 42 with which the head portion of the spindle I5 is provided. The inner clutch member 31 is thus continuously coupled to the spindle for rotation therewith.

The outer clutch member 38 is also provided with a fin 44 which is received in a slot 45 with which the key plug 28 is provided at its inner end and thereby the outer clutch,` member is coupled to the key plug.

The outer clutch member 38 is provided with a centrally located pin 48 which is backed by a suitable spring 41 and which tends to hold the two clutch elements 31, 38 disconnected from each other as shown in Figs. 10 and 12.

- The pass key 33 is so constructed that when it is inserted into the key slot to line up the tumbler pins, the end of the key will engage the n 48 of the outer clutchl member 38 just before the key has been fully entered into the key slot and before the tumbler pins are properly lined up. so thatduring the nal movement of the V- key into the slot, the tumbler pins become properly lined up and the outer clutch member is given an inward movement -against the actionof the spring 41 suiijcient to enter the rib 40 on said outer clutch member into the slot 39 of the clutch members together.

door by turning the outer knob.

Before describing the means by which these ends are accomplished, I will refer to the construction of the inner knob I4.

The inner end of the inner knob I4 is pro'- vided with a .recess 48 in which is received a collar 48 that is rigidly secured to the knob through the mediumv of a screw 50. The collar 48 is formed with a stud 5I which is received in a recess 52 formed in a coupling collar 58 that is provided with a square opening 54 through which the square spindle .I5 extends.

The turning of theinner knob I4 will turn the collar 49A and through the co-operatio of the pin 5I and the recess 52 this turning nvement will be communicated to the cou ling collar 53 and thereby to the spindle I 5.

A It will be remembered that normally the cl tch 31, 38 by which the plug 28 is coupled to the spindle is held disengaged by the pin 48 fand spring 41 as shown in Figs. 10 and 12 and the spindle I5 is therefore free to be turned by the inner knob at any time even though the outer knob is locked from turning movement. The recess 52 is wider than the diameter of the stud 5I so that there is a certain amount of play between the collars 49 and 53. The collar 53 is shown as having two spring arms -55 extending from the periphery thereof which embrace a. stud 58 carried by the collar 49, these spring arms serving as a yielding centering device to normally hold the two collars in relative position with Athe stud 5I occupying the center of the recess 52.

When this condition is secured, the outer knob I3 is free to be turned on the knob-supporting member I84 because the tumbler pins have been lined up, and the key plug 28 is clutched or coupled to the spindle I5 so that the turning of the outer knob will turn the spindle and thereby withdraw the doorlatch 2. l

When the key is withdrawn, the spring E1 functions to separate the two members of the clutch thus unclutching the outer knob from the The inner knob I4 is supported by a sleeve 58 which is rigid with the spindle I5. This sleev'e 58 is adjustably mounted on the spindle for .which -purpose the outer end of the spindle is screw threaded as shown at 59, the screw threads being cut on the corners of the square spindle only. The sleeve 58 is interiorly screw threaded to t the screw threads 59. Said sleeve is held in its adjusted position by a set screw 88 which is set against one of the fiat sides of the spindle.

I have stated above that the present invention involves a construction by which the lock can be set from the inside knob so that the clutch 31, 38 remains engaged and the tumbler pins -fremain lined up even after the key 33 has i been removed, thus freeing the outer knob for movement of the 4end portions 1| the outer end of the stem 8| being screw threaded as shown at 62 and having a knob 93 screw threaded' thereon, which knob extends through an axial opening in the inner knob Il and projects beyond the inner face thereof. A spring 3l encircles the stern 6I and is conned between the finll and a shoulder 98 formed in the spindle I5, said spring normally holding the clutch member 38 yieldingly in Fig. 12. By pushing inwardly on the knob 93, the stem 6| and the connected clutch member 31 will be moved axially to the left a sufficient distance to bring the two clutch members 31, 38l

into clutching engagement as shown in Figs. 3 and 11. This same movement operates also to line up the follower pins 3| by the following means: The follower pins 3| are shown as carried by a block 64 which is mounted in a slot with which the knob-supporting member I9 is provided and is capable of vertical movement therein.y This block is retained in the slot by means of a retaining plate 65. The block is provided with two laterally extending arms 66.

the position shown in 'I'he knob-supporting member |16 is provided with a block-lifting element 61 herein shown as made from a piece of wire bent centrally to present the bridge portion 63 which extends from one side to .the other of the knob-supporting member i6 through a transverse opening therethrough, and a'lso bent to present the two arms 69 extending along opposite sidesv of theknobsupporting member. The. outer ends of these arms are bent up as indicated at 10 and then bent backwandly as shown at 1|, the backwardly bent portions 1| lying under the arms B6. The elbow portion 12 of each arm 69 lies on a cam face 13 formed on the side of the knob-support-`V ing member. 'I'his block-lifting element 61 is normally in the position shown in Fig. 2 and is retained in such position by the spring arm 99, but when it is moved to the left into theL position shown in Fig. 8, the elbow portions 1-2 ride up the inclined surfaces 13 thereby raising the end portions 'Il of the arms. This rising operates through the arms 66 to raise the block. 6I thus lifting the 'follower pins out of engagement with the plug 28 and unlocking the plug from the knob-supporting member as seen in Fig. 19.

The'movement of the knob 63 inwardly into the position shown in Figs. 3 and 11 not only brings the two clutch members 31, 38 into clutching engagement but also moves the outer clutch member 38 further into the plug 28, during which movement the portion 14 of the outer clutch member engages the bridge portion 63 of the block lifting member and pushes said member to the left into the position shown in Fig. 8, thereby causing the elbow portions 12 toride up the inclining faces 13 withthe result that the block 64 carrying the follower pins is raised to lift the followerlpins out of theA plug 29.

When this condition obtains then the outer knob I3 is `unlocked .from the knob-supporting member and is also coupled to the spindle i5 so that the door latch can be withdrawn by simply turning the outer knob and without the use of a key.

The stem 5| is yieldingly retained in this posii tion by means of a spring detent 15 carried by the sleeve 59 andwhich is adapted to snap into a. recess 16 formed on a collar 11 carried by the stem 6| as shown in Fig. 3.

The lock may also be set from the inside of the door so that the two clutch members 31, 38 can not be clutched together by the insertion of the pass key 33 into the key slot, but only by the use of a special key.

' This is accomplished by pulling theknob I3 together by using a special key 19 which has a than the regular pass key 33. inserted into the key slot, it not only lines up the tumbler pins but the movement of the key in the slot necessary to line up the tumbler pins is sulcient to move the outer clutch 38 into clutching engagement with the inner clutch 31.

The stem 6I and knob 63 may be yieldingly held in the position shown in Fig. 4 in various ways. As herein shown, the outer knob is provided with a spring-pressed retaining pin 3| and the collar 11 is formed with a recess 92 into which the inner end of the pin may snap when the stem is pulled outwardly into the position shown in Fig. 4, the engagement of the pin with the end wall of the recess serving to hold the stem in this position. The side walls 33 of the recess longer point 80 When this long key is are beveled so that a turning movement of the the recess and freeing the stem for return to its normal position through the medium of the spring 64.

In Figs. 23 to 37 I have shown a different form of the invention which is somewhat simpler than that illustrated in Figs. 1 to 22. Inv this simpler form of the invention, the outer knob is indicated at H3, the inner knob at Il'l anthe spindle at H5. The spindle ||5 is square in cross section as usual in door knobs and the inner knob ||4` is provided with an interior collar |00 through which the spindle I5 extends, said collar having a square opening to fit the square shape of the spindle. This collar is rigidly anchored to the outer knob by means of a projection |0| which is rigid with the collar and which nts .a recess formed in the inner knob. By this means, the inner knob IM is constantly coupled to the spindle so that turning movement of the inner knob will turn the spindle.

The outer knob ||3 is mounted for turning movement on a. knob-supporting memberlll which is anchored to the door inthe same man' |31 and |33 which in some respects are similar to the clutch members 31, 38 shown in Figs. 1 to 10. A

The clutch member |31 is made integral with the spindle H5, said clutch member having in itsv outer side a diametrical slot 4|39. The outer clutch member |38 is located within a chamber |03 with which the knob-supporting member III is provided and is provided with a fin |40 adapted to enter said slot for clutching the two clutch elements together. Situated between the two clutch elements is a spring |02 which normally keeps the clutch elements separated or disengaged 9 from each other. Theouter clutch element |33 is provided with a stem |3| which extends axially through the spindle IIS-and projects beyond the inner knob I I3, the outer end of said stem being screw threaded and having a thumb piece or small knob |33 screw threaded thereto.

Situated vwithin the chamber |03 of the knobsupporting member ||3 is a cylindrical barrel element |03 which is provided with an opening in which is locatedy a key plug |23 provided with the. usual key slot |29. The plug |23 is normally locked to the barrel element |03 through the medium ofthe usual tumbler pins |30 and follower pins |3|, the latter being backed by the usual springs |32. When a proper key is inserted into the key slot |20, the tumbler pins and follower pins will be lined upthereby unlocking the plug' |23 from the barrel |04.

The barrel IMv is coupled to the outer clutch member |33, this being accomplished by means of two coupling pins I which project from the inner face o! the barrel and extend through openings |39 in the outer lclutch member |33.

Said clutch member |33 is formed in its periphery with a notch |03 which normally receives a proever, the key plug is unlocked and is pushed inwardly, the projection ||0 is carried out of the ,|33 in its clutching engagement with the inner clutch member.

Wheirthe key plug is turned back again by means of thekey-into a position to bring the projection ||0 into register with the recess 'and the key is then withdrawn, the spring |02 will function to disengage the clutch members |31, |38 by moving the clutch member |33 back into itsinitial position shown in Fig. 23 in which the pin |01 on the knob-supporting member ||3 occupies the notch |03 in said clutch member and thereby locks it from turning movement.

' This disengaging movement of the clutch mem- The outer knob ||3 is secured to the barrel |04 by means of attaching screws |03 which extend through the portion |09 of the knob that overlies the end of the barrel and are screw threaded into said barrel.

The key plug |28 is constructed so that it can move inwardly when it has been unlocked from the barrel by the insertion of a keyinto the key slot. The inner end of. the key plug |23 engages the outer clutch member |30 whenthe latter is in its normal position shown in Fig. 23. To open the door from the outside, a proper key |81 is inserted into the key slot |29 thereby to line up the tumbler and follower pins and to unlock the key plug |28 from the barrel |03. The unlocked key plug is then pushed inwardly thereby moving'the outer clutchv member |38 inwardly which results in coupling the outer clutch member |38 to the inner clutch member |31 anclalso in moving the outer clutch member inwardly out oi engagement with the locking projection |01.

When the outerclutch member is in this position, then the turning of the outer knob ||3 Will result in turning the barrel y|03 within the knob-supporting member and since the outer clutch member is coupled tothe barrel by means of the coupling pins |35 and is also clutchedto the inner clutch member |31, such turning of the outer knob will result in turning the spindle i5 thereby withdrawing .the door latch.

The coupling pins |05 are of sumcient length so that the outer. clutch member |33 remains coupled to the barrel even when it is pushed inwardly into clutching engagement with the inner clutch member |31.

The key-plug |23 is provided on its inner endv With an outwardly extending projection H0 which is normally received in a, recess with which the barrel |03 is provided. When, howber |30 will also move the plug |23 backwardly to its initial position and the tumbler pins |30 and the follower pins |3| will then function to lock the key plug |20 to the barrel member there'- -by locking vthe knob from turning movement.

I have stated above that this .embodiment of the invention is also provided'with means 'by which the locky can be set from the inside knob so that the clutchmembers |31, |33 willbe in clutching engagement and the outer knob will be free to be turned for opening the door without the use of 'a key.

The inner end of the spindle H3 has a sleeve |10 screw threaded thereon, said sleeve extending into a central opening with which the inner knob III is provided and being formed with a ange |1| which overlies the face of the inner knob H4.

|12 indicates a collar which is mounted for turning movement on the hubportion |19 of the knob |83 and is located between the knob |63 and the flange |1| of the sleeve |10; This r collar |12 is loosely mounted on said hub and is provided with two legs or projections |13 which are adapted to be received in recesses |13 with which the sleeve |10 is provided.

The construction is such that when the clutch members |31, |38 are disengaged, the collar |12 will be resting against the sleeve |10 and the projections |13 are occupying the recesses |14.`

By pulling inwardly on the knob |33, the outer clutch member |38 will be moved inwardlyinto clutching engagement with the inner clutch member |31 and will also be moved out of locking engagement with the projection l|01 on the knob-supporting member. After the stem |3| 4has been thus pulled inwardly, the collar |12 may be moved backwardly to withdraw the pro jections |13 from the recesses 11d and then by giving the collar a turning movement on the spindle, these projections |13 will -be carried out of register with the recesses and will by their engagement with the sleeve |10 hold the outer clutch member in its clutching engagement with the inner clutch member and also hold said outer V collar |12 from being accidentally restored to a position in which the projections |13 4register with the recesses |14. this position, the outer knob is free to be turned Without the use of a key, and the turning ot When the parts are lin 11 e the outer knob will operate through the engaged clutch members |31, [38 to turn the spindle H5 and thus withdraw the door latch..

The lock can thereby be set from the\inside of the door so that a person can turn the outer knob and open the door without the use of a key.

The outer clutch member |31 is shown as provided with a radial slot |15 which is normally in linewith the key slot. The purpose of this is to make it impossible for an unauthorized person to insert a wire or other small implement into the key slot and push the outer clutch member backwardly into clutching engagement with the inner 'clutch member and at the same time uncoupling said outer clutch member from the knob-supporting member.

I claim: c

1. A-doorlock comprising a knob-supporting member stationarily secured to the outside of the door and projecting outwardly therefrom, an

= outer knob mounted on said knob-supporting member for turning movement, a lock located within the knob-supporting member and comprising a rotary member connected to the outer Yknob for simultaneous rotation therewith and means to lock the rotary member to the knobsupporting member, a spindle extending through the door and provided with means to Withdraw the door latch as the s-pindle is turned, an inner knob mounted on and connected to the spindle, a normally disengaged clutch device for coupling said rotary member and thereby the outer knob to the spindle, and key-actuated means to both unlock said rotary member, and thereby the outer knob, from the knob-supporting member and to 'render' the clutch device operative to clutch the rotary member, and thereby the outer'knob, to the spindle.

2. A door lock comprising a knobsupporting *member station-arily, secured to the outside of the door and projecting outwardly therefrom, an outer knob mounted on said knob-supporting member for turning movement, a key-actuated lock located within the knob-supporting member and comprising a rotary member connected to the outer knob for simultaneous turning movement therewith, and means normally locking said rotary member, and thereby the outer knob, to the knob-supporting member, a spindle extending through the door and provided with means to withdraw the door latch as said spindle is turned, an inner knob :mounted on and connected to the spindle, a normally disengaged clutch device for coupling said Vrotary member, and thereby the outer knob. to zthe spindle, and means operable from the inside #of the door to unlock the rotary member, and

thereby the outer knob, from the knob-supporting member and also to render said clutch device op,-

erative, whereby the spindle may be turned from the outer knob without the use of a key.

3. A door lock comprising a knob-supporting member stationarily secured to the outside of the door and projecting outwardly therefrom, an outer knob having an axial chamber in which said knob-supporting member is received, said outer knob being mounted on said knob-supporting l member for turning movement, means normally locking said knob to the knob-supporting member, said means including a, cylinder lock located within the knob-supporting member and provided with a plug and connected to the outer knob for simultaneous turning movement therewith, and also provided with tumbler and follower pins normally locking the plug to the knob-supporting member, a` bolt actuating spindle extending 12 through the', door, an inner knob mounted on and connected to said spindle, a normally disengaged clutch device to couple the plug, and thereby the outer knob, to the spindle. and means operable from the inner knob to both line up the tumbler and follower pins to unlock said plug, and thereby the outer knob, from the knob-supporting member'and also to render said clutch device operative. 4. A door lock comprising a knob-supporting member statlonarily secured to the outside of the door and projecting outwardly therefrom, an outer knob mounted on said knob-supporting member `for turning movement, means normally locking saidouter knob to the knob-supporting member, said means including a cylinder lock located within the knob-supporting member and provided with a key plug having a key slot and connected to the outer knob for simultaneous turning move- 'ment therewith, and also provided with tumbler and follower pins normally locking the key plug to the knob-supporting member, which pins are lined up by the insertion of a key in the key slot, a bolt-actuating spindle extending through the door, a, normally disengaged clutch device to couple the key plug, and thereby the outer knob, vto the spindle, and means to render the clutch device operative by such insertion of the key into the key slot.

5. A door lock comprising a knob-supporting member secured to the outside of the door and projecting outwardly therefrom, an outer knob having an axial chamber in which said knobsupporting member is received, said outer knob being mountedon said knob-supporting member for turning movement thereabout, a cylinder lock located Within the knob-supporting member and including a key plug connected to the outer knob forv simultaneous turning movement therewith, said key plug having a key slot and cooperating tumbler and follower pins by which said key plug is normally locked to the knob-supporting member'but which are lined up to unlock the knob from the knob-supporting member by the insertion of a key in the key slot, a bolt-actuating spindle extending through the door, a normally disengaged clutch device to couple the key plug, and thereby the outer knob, to the spindle, said clutch device being situated-to be engaged and rendered operative by ,a key inserted into the key slot, whereby the insertion of the key into the key slot both unlocks the outer knob from the knob-supporting member and couples said outer knob to the spindle.

6. A door lock comprising a knob-supporting member stationarily secured to and extending from the outside of the door, an outer knob having an axial chamber in which said knob-support# ing member is received, said outer knob being mounted on the knob-supporting member for turning movement thereabout, a cylinder lock located within the knob-supporting member, said cylinder lock including a key plug having a key slot and cooperating tumbler and follower pins by which thevkey plug is normally locked to the knob-supporting member and which may be lined up to unlock the key plug from the knob-supporting member bythe insertion of a key in the key slot, means providing a connection between the outer knob and the key plug by which rotation of one is transmitted to the other, a bolt-actuating spindle extending through the door, two co-operating clutch members for coupling said plug, and

thereby the outer knob, to the spindle and a spring normally holding said clutch members disengaged,

by the outer clutch member except when the key- 1,902,343

13 engaged and moved into clutching engagement with the other clutch member by a, key inserted into the key slot, whereby the insertion 4of the key both-unlocks the key plug, and thereby the outer knob, from the knob-supporting member and operatively engages the clutch members.

'1. A ldoor lock comprising a knob-supporting member secured t the outside of the door, an outer knob mounted thereon for turning movement, a spindle extending through the door, an inner knob mounted on and connected to said ment therewith, cooperating tumbler and fol-- spindle, means normally locking the' outer knob to the knob-supporting member, a clutch comprising two co-operating clutch members to couple member for turning movement, a spindle extending through the door, an inner knob mounted on and connected to the spindle, means normally locking the outer knob to the knob-supporting member, a clutch device having inner and outer clutch membersfor coupling the outer knob to the spindle, 'means normally holding the clutch A members disengaged, key-controlled means'operable from the outer knob for unlocking the latter and for moving the 'outer clutch member into clutching engagement with the inner clutch m'ember thereby to couple the unlocked outer knob to the spindle, and means operable from the inner knob to render the clutch de vice incapable of being engaged throughthe operation oi' the keycontrolled means.

9. A door lock comprising a knob-supporting member secured t0 the outside of the door, and

outer knob ymounted on said knob-supporting member for turning movement. a spindle extending through the door, an inner knob mounted on and connected to the spindle, means normally locking the outer knob to the knob-supporting member, a clutch device having inner and outer clutch members for coupling the outer knoblto the spindle, means. normally holding the clutch members disengaged, key-controlled means operablefrom the outer knob for unlocking the latter and for moving'the, outer clutch member into clutching engagement with the inner clutch mem- 55 ber thereby to couple the unlocked outer knob to the spindle, and means operable from the inner knob' to move the inner clutch member into an inoperative position in which it cannot be engaged controlled means is actuated by a special key.

10. A door lock comprising a knob-supporting member stationarily secured to theoutside of the door and projecting outwardly therefrom, lan outer knob having an axial chamber in which said knobsupporting member is received,v said outer knob being mounted o'n said knob-supporting member for turning movement thereabout; a lock located within the knob-supporting member and including a key plug having a. key vslot and connected to the outer knob for simultaneous turning movelower pins normally locking the key plug, and thereby the outer knob, to the knob-supporting member, which pins arelined up to unlock the key plug, and thereby the outer knob, from the knob-supporting member by the insertion of a key in the key slot, a bolt-actuating spindle extending through the door, an inner knob mounted on the spindle, a normally disengaged clutch device to couple the key plug. and thereby the outer knob, vto the spindle, and means. operable by the insertion of a key in the key slot to render the clutch device operative when the outer knob is xunlocked. Y

11. A door lock comprising a knob-supporting member stationarily secured to and extending from the outside of the door, anv outer knob having an axial chamber in which said knob-supporting member is received, said outer knob being mounted on the knob-supporting member for turning movement thereabout, a lock located withinl the knob-supporting member, said lock including a rotatable plug connected to the outer knob for simultaneous turning movement therewith, co-

. operating tumbler and follower pins normally' locking said plug to the knob-supporting member, a bolt-actuating spindle extending through the door, two cooperating clutch members for coupling saidplug, and thereby the outer knob, to the spindle, a spring normallyl holding saidv clutch members disengaged, and means operable from the inner knob to lineup the tumbler and follower pins thereby unlocking the plug and the outer knob from the knob-supporting member, and also to move the clutch members relatively into operative clutching engagement.

JOSEPH H. MILMGAN.

REFERENCES The following references are oif record in the file of this patent: i

UNITED s'ra'rns PATENTS Number Name, Date 509,194 carey Nov. 21, 1893 823,221 Jorgenson --.June 12, 1908 866,583 Hope .'Sept. 17, 1907 1,755,434 Ellingson Apr. 22, 1930- 1,810,90 9 Ellingson .i 'June 23', 1931 Shaw ---a Mal'. 21, 1933 

